This four-panel uPVC window is built for wide openings where you want maximum daylight, but you also want proper everyday ventilation without turning the whole window into opening sashes. The unit is made as one combined frame with four vertical sections, and each section is split into two parts: a top-hung vent at the top and a fixed glazed panel below.

The main feature of this design is the four top vents. Each vent is top-hung, which means it’s hinged along the top edge and opens outward from the bottom. This gives you controlled airflow while keeping the opening higher up, which is useful in bedrooms, living rooms, and larger upstairs spaces where you want fresh air without a wide-open window. Because there are four vents across the unit, you can open one vent for light airflow or open multiple vents to increase ventilation across the whole room. It’s a practical layout used in many uPVC windows where comfort and ventilation need to work together.

The lower panels are fully fixed glazed sections. They do not open and should not have handles or opening hardware. Keeping the bottom sections fixed also helps with insulation and stability, reducing draughts and heat loss while still giving you large, clear views and plenty of natural light. This combination of opening vents and fixed lower glazing is a smart option within uPVC casement windows, especially for wider window openings.

Made from durable uPVC, the frame is low maintenance and easy to look after. Like other uPVC casement windows, it doesn’t need painting and can be made to measure to suit different property styles and room layouts.